Peters



JOHN S. HALL, OF PITTSBURG, PENNSYLVANIA.

Letters Patent 1Y0. 80,478, dated July 28, 1868.

IMPROVED MACHINE FOR MAKING BOLTS AND SPIKES.

s rlurhule einer tu im there @hints ziteut mit mating part nf tige sans.

To ALL when 1r MAY coNennN:

Be it known that I, JOHN S. HALL, of Pittsburg, in the county of Allegheny, and State of Pennsylvania,

have invented certain new and useful Improvements in Machines for Making Bolts, Spikes, and similar articles and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part ot' this specification, in which-f- Fignre I represents a longitudinal vertical section through the machine, showing more particularly the he ading operation.

Figure 2 represents a vertical transverse section, showing more particularly the griping of the bar or blank.

Figure 3 represents atop plan of the machine, and

Figure 4 represents a top plan of a portion ofthe griping and heading-mechanism, not clearly seen in fig. 3.

Similar letters of reference, where they occur in the separate figures, denote like parts in all the drawings. My invention relates more particularly to the operation of the header, which, though worked by a cam, comes against the end of the bar or blank by a sudden blow or impact, which forms a very perfect head, and on the largest of bars, or rods, or blanks. A

' And my invention further relates to the manner of removing the bar, rod, o1' bolt o`r spike, after it has been made, from the machine.

To'enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings. Y A represents the bed of the machine, on `which is supported, in bearings B, a shaft, C, that is` turned by any suitable power and appliances, and havingupon it, and turning with it, a cam, D, a portion of the perimeter of which is cut away, as at E, and also a tappet, F, and collar, G.

. In pillar-blocks H, on the bed A, is hung a shaft, I, upon which is `placed a weighted lever, J, thatis slotted in' the line of its length, as at a, fig. 3, said lever extending rearwards of the machine, and so as to come within the range of the can] D, and be operated by it. To the lower part ofthe shaft I, or to the lower part ofthe hubof the lever J, the header K is conneetedby a link,`b,-so that the rising and falling of the lever J will move the header back and forth horizontally, or nearly so, in its ways, so as to work in dies or formers, to strike up i the head upon the bar, rod, or blank, when placed therein.

The griping and forming-die is made of t'wo parts, c e', the former being permanently secured on the bed A,

and the latter being movable, as will be explained, Vfor the introduction ofthe bar, rod, or blank to be headed.

On or in pillnr-bloeks L L, at or near the 4front of the machine, is pivoted ra weighted lever, M, to which is connected, by a link, d, the movable portion, c', of' the die, as seen in iig. 2. This lever M is raised up and let down by a cam, N, oh the end ot' a shaft, O, which shaft gets its rotation from thc shaft C, through the bevelgears I I, and this rising and falling of the 'weighted lever M opens and closes the die.`

Underneath the bed is arranged` a gauge, e, fer defining the distance that thebar, rod; or blank shall project into' the die. This gauge is operated by or from the movable portion e of the die, or from the lever M, so that, when the die is open to receive the rod or blank, the gauge will-be in position to stop it at the proper position in the die,'anil when the die closes, the gauge is drawn away, and the rod, bar, or blank is rigidly griped in the die, and really t0 receive the blow of the header. "he barrer rod, when long, is fell in at f, and when the hca'l is formed upon it, and the die is opened, it will drop down, and can be drawn out very readily, there being nothing to prevent it from being taken out. A

When spikes or bolts are made, and the blanks are cut from a baror rod, then the bar orrod is fell in over or above the stationary shearg, and it is cut of? by a in`oving shear, h or e', on the shear-stock Q, according to the length to be cut ofi. The sheaastoek is worked in its ways or guides, lt, by means of a lever, S, pivotcd at' j, and extending rearward, and raised and lowered by thctappet F, which is made fast to the collar G by a screw=bolt, t, or otherwise, so that it will turn with said eclla'r, and with the shaft C, to which the collar is fastened. i

. Y it When heading long bars, rods, or bolts, the shears are not used, and when not required' in use, the tappet F is released from the collar Gr, and thus being loose' on the shaft, does not revolve with it, and when thus released, the lever S drops at its rear, and raises the shear-stock and shears above the point where the long bar, rod, or bolt is fed in, and they remain there inactive.

An arm, Z, on the lever-head or hub, projects into a slot in the shear-stocli Q, and by this arrangement the shear-stock is moved when in use.

l When very short bolts yare headed, so much so that 'their shanks do not afford sucient surface for the griping-dies to hold on to and resist the force of the heading-ram, then the shear t', which works close up to the dies, may serve to hold this short bolt or blank, in part, against the force of the ram or header, its position, as shown in iig. l, admitting of such use of it, as it has also a support against the stationary shcarg and its stock.

The gauge e, as before stated, is worked from lthe griping-ram, to move it into and out of position, at proper intervals, by means of a stud, m, that is in the gripng-ram, and extends into a pivoted lever, n, underneath the bed, 'said lever n having a wedge, o, or its equivalent, upo'n it, that takes against the spring-arm that carries the gauge, and moves the gauge away from between the dies, after the bar or rod has been properly placed or griped in the dies,'and which spring, as the wedge is removed by the reverse action ofthe griping-'ram, returns the gauge again into its active position. 'I'he gauge e is so located with regard tothe dies and the header as that there shall be considerable space between the end of thc bar-rod or blank and the point where the ram starts from, so that the header shall have acquired great impulse before it reaches the end of the bar, rod, or blank, and form the head by a blow., and with a comparatively light hammer. When the bar, rod, or blank is fcdfin until it reaches the header, or, in other words, when the header is the only gauge to the feeding, then it hasto space in which it might accumulate force by falling, to strike a sudden blow, and, in such case, the header would have, though weighted, but little,vif any., greater force than those worked by a positive pushing-motion from a'catn. A K

Vllen the size and form of, the bolts or spikes are changedof course a corresponding change is made in the shears and in the dies, but the operation is substantially the same. In very long bolts or tie-rods, which are headed, the shears are not required. And in making such articles, my fnachine affords .great facilities for removing such long pieces, for the moment the dies open, the bolt or bar drops down out of the die, and clear of the encumbering parts of `the machine, whence it can be drawn eut'endwise. l

In most, if not all, of the heading-machines heretofore made, the `nished article has to be raised up out of the dies, and when the bar is long and heavy,`t'his `is no easy hand operation; besides, the head being large, cannotbe drawn out of a space that would be large enough to feed the bar through. There is, therefore, a very great advantage in my construction of machine, so far as the delivery of'A the headedbar, rod, or bolt-is concerned, viz, by dropping from the dies, upon a support 'of any kind, which may be a roller, and thus, without any lifting, be readily withdrawn.

In very heavy Work, the gauge may be dispensed with, or arranged at the sides, so that there will be clear, unobstructed space below the dies for the bar or bolt to drop through and be drawn out. But, imeither of these cas-es', the-heading-ram must have space en ough to lpass through before it reaches the rod, bar, or bolt, or blank, kto get up the necessary speed or motion to strike a suddenblown The momentum desired, accomplishing with a small ram what a positive cam-motion of many tons would hardly accomplish.

The shear z' works so close to thediesjhat the latter act in conjunction with said shear z', to sever the blank or bolt from the rod.

The closing of the dies upon the hot metal to be headed, and the impact of the heading-ram, as also the opening of the dies, releasing of the headed article, and withdrawal of the header, are all done in` an instant of' time, so that the dies and header do not become highly heat-ed, or at all. v

Having thus fully described fny invention, what I claim. therein as new, and desire to secure by Letters Patent, is-

1. The combination of the heading-rain and its lever with the griping-dics, gauge, and with the cam D, so that the ram shall have attained great momentum before it reaches the bar, bolt, or blank in .the dies, and thus form the head, substantially as described.

` 2. I also claim the unobstructed space under or below the dies' and feeding-poi-nt, so that when the gripingrram recedos, afer heading or upsetting of the end of along bar or bolt, said bar or bolt may drop o'ut ofithe dies, and thence be drawn out of the machine, substantiallyA as described. f A

i JOHN S. HALL. Witness-cs:

`A. B. Srouon'ron,

JAMEs Durme. 

